Lü Buwei was a prominent minister of Qin during the decades before the kings of Qin formally became emperors. He began his career as a simple merchant, and, because of his keen mind for strategy and administration, his business was extremely profitable. Nevertheless, his career trajectory would dramatically change after a trip to the city of Handan, the capital of the state of Zhao.
While in Handan, Lü Buwei encountered a Qin nobleman being held there as a diplomatic hostage—the man’s name was Zichu. He was one of more than twenty sons fathered by Lord Anguo, who had become the crown prince of Qin around 267 BCE. As such, Zichu was a member of the Qin royal family, but he was still considered low enough in the succession to be given away by his king as a hostage to assure peace between Qin and Zhao. Nevertheless, with a potential heir to the kingdom of Qin at his fingertips, Lü Buwei decided to give up the life of a merchant for that of a politician.